I've noticed that many natural bodybuilders/coaches make use of IIFYM during contest prep time, fitting the occasional "treat" into their macros or allowing for poptarts, skinny cow treats, low fat frozen yogurt, etc. post workout and during refeeds, while IFBB pros don't seem to follow this philosophy. Obviously drug protocols can make a big difference, but do you guys think that a Mr. Olympia competitor could bring the same physique to the stage without dieting on entirely "clean" foods?
One possible factor that I've thought of is that for IFBB pros, this is their career/life in many cases, whereas most natural competitors probably have a more well rounded life and IIFYM may fit better in their lifestyle. Any thoughts on the topic? I am a big fan of IIFYM for what it's worth. Layne Norton has made some excellent points on IIFYM when he's stated that if you are hitting your micronutrients, you won't have much room for "crap" in your diet regardless.